The paper introduces the definition of Next Generation Network (NGN) given by ITU-T SG13 on its February meeting in 2004 and the latest development of NGN standardization. It further discusses the NGN architecture and...The paper introduces the definition of Next Generation Network (NGN) given by ITU-T SG13 on its February meeting in 2004 and the latest development of NGN standardization. It further discusses the NGN architecture and the evolution of networks to NGN, and emphasizes the Softswitch technology that features open architecture and packet-based transmission. At the end it introduces some network evolution strategies from operators outside China.展开更多
The Next Generation Network (NGN) has been a term frequently quoted in the hot topics of Telecommunication industry. The Softswitch and the IP Multimedia Subsystem (IMS) are proposed to implement the NGN services. It ...The Next Generation Network (NGN) has been a term frequently quoted in the hot topics of Telecommunication industry. The Softswitch and the IP Multimedia Subsystem (IMS) are proposed to implement the NGN services. It is imperative to reach a consensus on positioning and planning their future directions. However, it is rather difficult to realize smooth network evolution towards IMS as the Softswitch mainly supports the traditional Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN) services. In addition, the basic and complementary services of Softswitch are offered locally.展开更多
Softswitch technology integrates the su-periorities of both an intelligence net-work and the Internet, which embodiesits maturity and advancement. With ahierarchical network model, it effectivelysolves problems of evo...Softswitch technology integrates the su-periorities of both an intelligence net-work and the Internet, which embodiesits maturity and advancement. With ahierarchical network model, it effectivelysolves problems of evolution and convergenceof current communication networks. It also fol-展开更多
Reasonable steps,measures and strategies should be chosen for the evolution from fixed Softswitch to the IP Multimedia Subsystem (IMS). A smooth evolution to the IMS is possible by gradually introducing and expanding ...Reasonable steps,measures and strategies should be chosen for the evolution from fixed Softswitch to the IP Multimedia Subsystem (IMS). A smooth evolution to the IMS is possible by gradually introducing and expanding multimedia and mobile services to achieve Fixed Mobile Convergence (FMC) at the core network layer while leveraging the existing SS-based Public Switched Telephone Network Emulation Subsystem (PES) service functions. The core control layers of the Next-Generation Network (NGN),SS and IMS have basically identical architectures. However,SS is oriented to PSTN emulation services while the IMS makes a useful expansion in terms of mobility,security,Quality of Service (QoS) and Open Service Architecture (OSA) to enable FMC and multimedia services. Therefore,the evolution from SS to IMS is technically feasible. Operators who have already used SS can enable IMS-based full-service NGN through the evolution,which not only saves the investment and operation costs,but also reduces the risk of network alteration.展开更多
ZTE Softswitch supports the interoperability and convergence oflegacy PSTN/ISDN, PLMN, IN, and the Internet, allowing operatorsor service providers to offer diversified services to any subscriber atany time on a ZTE S...ZTE Softswitch supports the interoperability and convergence oflegacy PSTN/ISDN, PLMN, IN, and the Internet, allowing operatorsor service providers to offer diversified services to any subscriber atany time on a ZTE Softswitch network.With powerful C4 and C5 features, ZTE Softswitch effectivelysolves the evolution problems in the existing networks, protectinglegacy network investment and reducing future investment to a prof-itable level for providers.展开更多
The paper shows that ZTE Corporation provides advanced technicalguarantee for the QoS,equipment and service security,and terminal powersupply of its Softswitch system by taking part in drafting and makingdomestic and ...The paper shows that ZTE Corporation provides advanced technicalguarantee for the QoS,equipment and service security,and terminal powersupply of its Softswitch system by taking part in drafting and makingdomestic and international NGN standards and protocols.Moreover,its openNGN service platform helps carriers provide their subscribers with diversifiedservices,and its innovative business model brings carriers a good marketprospect.展开更多
所谓Softswitch,顾名思义,即以软件来执行传统局用交换机的功能。根据ISC(InternationalSoftswitch Consortium)的定义,由Softswitch技术运作的下一代网络架构包括应用层(Serviceand Application Plane)、控制层(Call Control and Signa...所谓Softswitch,顾名思义,即以软件来执行传统局用交换机的功能。根据ISC(InternationalSoftswitch Consortium)的定义,由Softswitch技术运作的下一代网络架构包括应用层(Serviceand Application Plane)、控制层(Call Control and SignalingPlane)、传输层(TransportPlane)及管理层(ManagementPlane),并在概念上将传统交换机的网络运作依功能划分成不同的功能实体(Function Entity),各功能实体间通过标准协议进行沟通,从而达成业务与控制的分立,并实现异质网络间的互通,完成传统电路交换网络(CircuitSwitch)与分封交换网络(PacketSwitch)的融合与演进。展开更多
Relationships between application layer protocols in softswitch are explored in this paper.Two notions, i.e.protocol relationship and protocol grouping, are proposed, which are not clearly defined and even not paid mu...Relationships between application layer protocols in softswitch are explored in this paper.Two notions, i.e.protocol relationship and protocol grouping, are proposed, which are not clearly defined and even not paid much attention to before.On the basis of a well known protocol relationship named protocol conversion, three novel protocol relationships including protocol collaboration relationship, protocol cooperation relationship and protocol independent relationship are presented, so that protocol relationships are classified into four types.According to the functionality and purpose of each protocol, main protocols related to softswitch are divided into five groups.As to protocol conversion in softswitch, information flow trail(IFT) is utilized to facilitate problem solving.A decision rule for protocol conversion mode is proposed to guide how to choose between direct conversion and indirect conversion.A property of protocol relationships in softswitch is induced from all kinds of service scenarios of softswitch.This property summarizes protocol relationships within each protocol group or between two specific protocol groups.A merit of protocol grouping together with classification of protocol relationship is also presented.The effort of this paper pushes the protocol engineering to go ahead.展开更多
In this paper, architecture of softswitch-based Next Generation Network (NGN) system and Session Initiation Protocol (SIP) are studied briefly, and the problems on the openness and extensibility of normal remote video...In this paper, architecture of softswitch-based Next Generation Network (NGN) system and Session Initiation Protocol (SIP) are studied briefly, and the problems on the openness and extensibility of normal remote video-monitoring system (RVMS) are analyzed. Then a RVMS framework model based on softswitch is given. Furthermore, designation and realization of the system based on T 6000 Softswitch Platform is provided. The innovation is considering the RVMS as a part of softswitch system. It is a feasible scheme for implementing next generation video-monitoring system based on broadband IP technique.展开更多
Based on the system feature of softswitch-based heterogeneous clustered media server, this paper proposed a limited resource vector load-balancing algorithm. The purpose of the algorithm was to balance the load of clu...Based on the system feature of softswitch-based heterogeneous clustered media server, this paper proposed a limited resource vector load-balancing algorithm. The purpose of the algorithm was to balance the load of clusters by utilizing all system resources effectively and to avoid violent shaking of the system per- formance. A lot of simulations on the Petri net model of load balance system are conducted and the algorithm is compared with some traditional algorithms on balancing ability for heterogeneity, system throughput, re- quest response time and performance stability. The results of simulations show that the algorithm achieves system higher performance and it has excellent ability to deal with the heterogeneity of clustered media server.展开更多
文摘The paper introduces the definition of Next Generation Network (NGN) given by ITU-T SG13 on its February meeting in 2004 and the latest development of NGN standardization. It further discusses the NGN architecture and the evolution of networks to NGN, and emphasizes the Softswitch technology that features open architecture and packet-based transmission. At the end it introduces some network evolution strategies from operators outside China.
文摘The Next Generation Network (NGN) has been a term frequently quoted in the hot topics of Telecommunication industry. The Softswitch and the IP Multimedia Subsystem (IMS) are proposed to implement the NGN services. It is imperative to reach a consensus on positioning and planning their future directions. However, it is rather difficult to realize smooth network evolution towards IMS as the Softswitch mainly supports the traditional Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN) services. In addition, the basic and complementary services of Softswitch are offered locally.
文摘Softswitch technology integrates the su-periorities of both an intelligence net-work and the Internet, which embodiesits maturity and advancement. With ahierarchical network model, it effectivelysolves problems of evolution and convergenceof current communication networks. It also fol-
文摘Reasonable steps,measures and strategies should be chosen for the evolution from fixed Softswitch to the IP Multimedia Subsystem (IMS). A smooth evolution to the IMS is possible by gradually introducing and expanding multimedia and mobile services to achieve Fixed Mobile Convergence (FMC) at the core network layer while leveraging the existing SS-based Public Switched Telephone Network Emulation Subsystem (PES) service functions. The core control layers of the Next-Generation Network (NGN),SS and IMS have basically identical architectures. However,SS is oriented to PSTN emulation services while the IMS makes a useful expansion in terms of mobility,security,Quality of Service (QoS) and Open Service Architecture (OSA) to enable FMC and multimedia services. Therefore,the evolution from SS to IMS is technically feasible. Operators who have already used SS can enable IMS-based full-service NGN through the evolution,which not only saves the investment and operation costs,but also reduces the risk of network alteration.
文摘ZTE Softswitch supports the interoperability and convergence oflegacy PSTN/ISDN, PLMN, IN, and the Internet, allowing operatorsor service providers to offer diversified services to any subscriber atany time on a ZTE Softswitch network.With powerful C4 and C5 features, ZTE Softswitch effectivelysolves the evolution problems in the existing networks, protectinglegacy network investment and reducing future investment to a prof-itable level for providers.
文摘The paper shows that ZTE Corporation provides advanced technicalguarantee for the QoS,equipment and service security,and terminal powersupply of its Softswitch system by taking part in drafting and makingdomestic and international NGN standards and protocols.Moreover,its openNGN service platform helps carriers provide their subscribers with diversifiedservices,and its innovative business model brings carriers a good marketprospect.
文摘所谓Softswitch,顾名思义,即以软件来执行传统局用交换机的功能。根据ISC(InternationalSoftswitch Consortium)的定义,由Softswitch技术运作的下一代网络架构包括应用层(Serviceand Application Plane)、控制层(Call Control and SignalingPlane)、传输层(TransportPlane)及管理层(ManagementPlane),并在概念上将传统交换机的网络运作依功能划分成不同的功能实体(Function Entity),各功能实体间通过标准协议进行沟通,从而达成业务与控制的分立,并实现异质网络间的互通,完成传统电路交换网络(CircuitSwitch)与分封交换网络(PacketSwitch)的融合与演进。
基金National Science Fund for Distinguished Young Scholars (No. 60525110)National 973 Program (No. 2007CB307100, 2007CB307103)+1 种基金National Natural Science Foundation of China (No. 60902051)Development Fund Project for Electronic and Information Industry (Mobile Service and Application System Based on 3G)
文摘Relationships between application layer protocols in softswitch are explored in this paper.Two notions, i.e.protocol relationship and protocol grouping, are proposed, which are not clearly defined and even not paid much attention to before.On the basis of a well known protocol relationship named protocol conversion, three novel protocol relationships including protocol collaboration relationship, protocol cooperation relationship and protocol independent relationship are presented, so that protocol relationships are classified into four types.According to the functionality and purpose of each protocol, main protocols related to softswitch are divided into five groups.As to protocol conversion in softswitch, information flow trail(IFT) is utilized to facilitate problem solving.A decision rule for protocol conversion mode is proposed to guide how to choose between direct conversion and indirect conversion.A property of protocol relationships in softswitch is induced from all kinds of service scenarios of softswitch.This property summarizes protocol relationships within each protocol group or between two specific protocol groups.A merit of protocol grouping together with classification of protocol relationship is also presented.The effort of this paper pushes the protocol engineering to go ahead.
文摘In this paper, architecture of softswitch-based Next Generation Network (NGN) system and Session Initiation Protocol (SIP) are studied briefly, and the problems on the openness and extensibility of normal remote video-monitoring system (RVMS) are analyzed. Then a RVMS framework model based on softswitch is given. Furthermore, designation and realization of the system based on T 6000 Softswitch Platform is provided. The innovation is considering the RVMS as a part of softswitch system. It is a feasible scheme for implementing next generation video-monitoring system based on broadband IP technique.
基金Supported by: (1) Specialized Research Fund for the Doctoral Program of Higher Education (No. 20030013006) (2) National Specialized R&D Project for the Product of Mobile Communications (Develop-ment and Application of Next Generation Mobile Intel-ligent Network System) (3) Development Fund for Electronic and Information Industry (Value-added Ser-vice Platform and Application System for Mobile Communications).
文摘Based on the system feature of softswitch-based heterogeneous clustered media server, this paper proposed a limited resource vector load-balancing algorithm. The purpose of the algorithm was to balance the load of clusters by utilizing all system resources effectively and to avoid violent shaking of the system per- formance. A lot of simulations on the Petri net model of load balance system are conducted and the algorithm is compared with some traditional algorithms on balancing ability for heterogeneity, system throughput, re- quest response time and performance stability. The results of simulations show that the algorithm achieves system higher performance and it has excellent ability to deal with the heterogeneity of clustered media server.
